77400401 has 8 divisors (see below), whose sum is σ = 83731200. Its totient is φ = 71123472.

The previous prime is 77400341. The next prime is 77400409. The reversal of 77400401 is 10400477.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77400401 - 2²⁶ = 10291537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77400409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10451 + ... + 16248.

It is an arithmetic number, because the mean of its divisors is an integer number (10466400).

Almost surely, 2^77400401 is an apocalyptic number.

It is an amenable number.

77400401 is a deficient number, since it is larger than the sum of its proper divisors (6330799).

77400401 is a wasteful number, since it uses less digits than its factorization.

77400401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26935.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 77400401 is about 8797.7497691171. The cubic root of 77400401 is about 426.1682294562.

Adding to 77400401 its reverse (10400477), we get a palindrome (87800878).

The spelling of 77400401 in words is "seventy-seven million, four hundred thousand, four hundred one".